The time left for exam is 40 minutes. I want a the final answer just

Five steps are involved in peptide synthesis. For synthesizing the dipeptide Gly-Ile from Gly and Ile, answer the followings: (7 marks) Which amino acid should have -COOH protected? Choose.. Choose... . Choose... . Choose... Which amino acid should have NH2 protected? is used to protect -COOH is used to protect -NH2 Which reagent is used to make the amide bond in the dipeptide? The protection on the -COOH is removed by The protection on -NH, is removed by Choose... . . Choose... . Choose